Non-reactive and Non-diffusive passive scalar transport
 

Hello,


I am trying to simulate a problem involving convective mass transport on ANSYS Fluent, but so far have been unsuccessful.

The problem is as follows:
An iodine contrast tracer (passive scalar) is carried with blood flow through the 3D mesh of an artery segment. There is 1 inlet and 3 outlets on the artery. The iodine contrast should not chemically react with its surrounding and it should not diffuse into the wall of the artery.

I believe that the molar concentration for the iodine should change at different spatial zones within fluid domain with respect to time as the iodine contrast, carried by blood, is transported from inlet to the outlet.


I have attempted to model this problem with following the "Species Transport Without Reaction" guide on ANSYS Fluent documentation.

I have attached the images of the setup. When I run the simulation on this setup, the residuals for the iodine contrast is not changing (exported data from results also show no change in the molar concentration at different timestep).

I am using a UDF (pulsatile blood) to define the inlet-velocity and outlet pressures.

I am very sure that I am making some mistakes setting up the simulation solution, but cannot identify them.

Can someone please help?

The screenshots of the solution setup are in the links below:
https://imgbox.com/Gq1Zw0yZ

https://imgbox.com/OM9mdzEl

https://imgbox.com/NtpvuArT

https://imgbox.com/3PqEcEJN

https://imgbox.com/4GaTWmxb

https://imgbox.com/2V7n0rVp

https://imgbox.com/5xXbP38S

https://imgbox.com/mUZPVzdw

https://imgbox.com/oWZYyFUB

https://imgbox.com/3BS1ko3g

https://imgbox.com/xJ5ZxQWc

https://imgbox.com/clJ7GilZ

https://imgbox.com/ahlHq75i

https://imgbox.com/qFyStcyw